Slip (materials Science) - Slip Systems - Bcc

Bcc

Slip in body-centered cubic (bcc) crystals occurs along the plane of shortest Burgers vector as well; however, unlike fcc, there are no truly close-packed planes in the bcc crystal structure. Thus, a slip system in bcc requires heat to activate. Some bcc materials (e.g. α-Fe) can contain up to 48 slip systems. There are six slip planes of type {110}, each with two <111> directions (12 systems). There are 24 {123} and 12 {112} planes each with one <111> direction (36 systems, for a total of 48). While the {123} and {112} planes are not exactly identical in activation energy to {110}, they are so close in energy that for all intents and purposes they can be treated as identical. In the diagram on the right the specific slip plane and direction are (110) and, respectively.

Elemental metals in the bcc crystal structure include lithium, sodium, potassium, vanadium, chromium, manganese, iron, rubidium, niobium, molybdenum, cesium, barium, tantalum, tungsten, radium, and europium. Compound materials with the bcc crystal structure include the cesium halides (other than CsF).